Resistance
Resistance is the measure of how
difficult it is for current to flow through something. And being familiar with resistance, it can
help you better understand electronic circuitry. Resistance deals also with
current that involves in voltage and with the conductors and insulators.
Insulators are those do not easily carry a current like glass, ceramics, woods, and plastics. For best result in resistance
study, Good Conductors is the one to deal with. Metal is the good conductor
that I am talking about. Current can easily flows trhough metals that’s why
plastics is used as cover for metal wires to be its insulator. Now how about
the Silicon and Germanium? They are called “the semi-conductors” which fall between conductor and insulator.
Size also reflects the resistance.
A thick metal wire can produce lower resistance, likewise shorter wire the
shorter the resistance. To have a higher resistance you need to have a longer
wire.
Resistors
More of circuits nowadays often
carry small amount of power that’s why resistors born. If the resistor carries
higher value of resistance, then if a voltage placed across it, the less
current will flow through it. To get the value of the resistor, color code is
need to be read or else you need a multitester to get the amount of resistance
into it. The unit for this time is “Ohms”, a very small size. Ohms is
Resistor
Color Coding
0
Black
1
Brown
2
Red
3
Orange
4
Yellow
5
Green
6
Blue
7
Purple/Violet
8
Gray
9
White
Reading
the Color Codes
Mose of the resistors composes of 3
color bands. The first and the second band is the number and the third is the
number of noughts. See example below:
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